Event/GeneratorObject/include/DataModel/tools/GenerateIndexingPolicy.h

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/***************************************************************************
 type generator that associates a known container with an IndexingPolicy.
 Used by ElementLink
 ----------------------------------------------------------------
 ATLAS Collaboration
 ***************************************************************************/
 
// $Id: GenerateIndexingPolicy.h,v 1.2 2003/04/16 01:32:53 calaf Exp $
 
#ifndef DATAMODEL_TOOLS_GENERATEINDEXINGPOLICY_H
#define DATAMODEL_TOOLS_GENERATEINDEXINGPOLICY_H
 
#ifndef BOOST_CONFIG_HPP
#  include <boost/config.hpp>
#endif
 
#ifndef DATAMODEL_TOOLS_FORWARDINDEXINGPOLICY_H
#  include "DataModel/tools/ForwardIndexingPolicy.h"
#endif
 
#ifndef DATAMODEL_TOOLS_DEFAULTINDEXINGPOLICY_H
#  include "DataModel/tools/DefaultIndexingPolicy.h"
#endif
 
#ifndef DATAMODEL_TOOLS_ISSTLSEQUENCE_H
#  include "DataModel/tools/IsSTLSequence.h"
#endif
 
namespace SG {
  template <class CONTAINER> struct GenerateIndexingPolicy {
  private:
    typedef IsSTLSequence<CONTAINER> _isSTLSequence;
 
    BOOST_STATIC_CONSTANT( bool, isSTLSequence = _isSTLSequence::value );
 
  public:
    typedef typename boost::detail::if_true<( isSTLSequence )>::template then<
        ForwardIndexingPolicy<CONTAINER>,
        // else
        typename DefaultIndexingPolicy<CONTAINER>::type>::type type;
  };
} // namespace SG
 
#endif // TOOLS_GENERATEINDEXINGPOLICIES_H